Air brake release valve



Oct. 3, 1933. LASCQ 1,929,174

AIR BRAKE RELEASE VALVE Original Fil-ed Oct. 5, 1928 INVENTOR TTTTTT EYPatented a. 3, 1993" "am am amass vaLvE Geor ge Inca, Pittston, Pa.

Application October 5, 1928, Serial No. 1 Renewed March 8, 1933,

1' Claim. (01. 251-104) 1 This inventionrelates to air equipment forrailway cars, and its general object is to provide a coupling pipe anglecock that includes a bleed w port to release the air pressure from thehose port that acts as a signalling means when the cock is closed, asthe passage of air from the port provides a noise that indicates to acasual observer that the cock is closed. This bleed port is'disposed insuch a manner that the air vented does not strike the operator. 1

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafterfully described, illustrated in the accompanying drawing andspecifically pointed out in the appended claim. In describing myinvention in detail, reference will be had to the accompanyingdrawing'wherein like charact'ersdenote like or corresponding partsthroughout the several views, and in which: Figure 1 is a fragmentarysectional view taken through the therein.

Figure 2 is a sectional view taken approximately on line 2-2 ofFigure 1. r Figure 3 is a detail view of the cock core or therein whichforms a part of the bleed port.

Referring to the drawing in detail, the letter' A indicates the body ofan angle cock, B the core .or key thereof, C an air pipe having securedthere-' to the body of the cock and'D the air hose that is provided witha coupling member on the end, not shown, for the purpose of cooperatingwith a similar coupling on the hose of an adjacent car.

The angle cock as shown is of the usual construction, with the exceptionthat the key or core B is formedwith a longitudinally disposed groove 1arranged in one side thereof at the enlarged end and between theoppositely disposedair ports of the coreor key as shown. The groove isof tapered formation with its small end uppermost, while the large endof the groove extends through the bottom edge of the core or key.

Formed in the lower portion of the body and arranged in the path of theenlarged lower end opposite end extends to the outer side of the body 7of the groove is one end of a bore 2 while its away from the operator. 1

From the above description and disclosure of I the drawing, it will beobvious thatwhen the cock is closed as shown in Figures 1 and 2, thegroove 1 is disposed in registration with the bore 2, with the resultthe air in the-hose between angle cock with the bleed Port keyillustrating the arrangement of the groove be directed the cars willexhaust through the bleed port formed by the groove land bore 2.

The forming of the bleed port in the angle cocks as disclosed"eliminates danger of damage and injury to parts of the coupling and tothe person, as it will :be apparent that when the angle cocks ofcooperating hose sections are closed, after air has been passedtherethrough, the air between, the angle cocks and in-the hose thereofwill'be of great pressure, but this pressure-will be reduced by leakagethrough the bleed ports and therefore the couplings can be disconnectedwithout fear of damage or In the event the forward angle cock betweenthe cars of a train isclosed, and the adjacent angle cock is open, airwill escape through the bleed port of the closed angle cock withthereport acts asa signalling means to indicate the position of the anglecock.

,It is thoughtfrom the foregoing description that the advantages andnovel features of my invention will be readily apparent;

I desire it to be understood that I may make changes inthe constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the sco of the appended claims What Iclaim is: I

An air brake release valvecomprising a hollow body having one endconnected to an air pipe and the opposite end connected to an aircoupling hose and said body having a tapered bore with the smaller enddisposed uppermost, and a tapered core in said bore and havingoppositely disposed air ports to control the air through the body, saidbody having a passage extending laterally at a substantially acute anglewith respect to said pipe to the atmosphere, said core 1 having atapering groove between the ports and extending longitudinally of thecore and having the smallest end always in communication with theinterior of the body adjacent the hose and adapted to have the largestend in communication with the passage of the body when the plug ispositioned to close the body against the passage of air through the bodyfrom the airpipe end thereof to bleed the hose of air pressure.

, GEORGE LASCO.

